Question detail
Explain how the shape of the lens changes during accommodation for distant objects.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
The human nervous system
Question
Explain how the shape of the lens changes during accommodation for distant objects.
Answer
During accommodation for distant objects, the ciliary muscles relax, which increases the tension on the suspensory ligaments. This tension pulls the lens into a thinner shape, allowing light rays from distant objects to be focused correctly on the retina.
Explanation
This answer effectively explains the physiological changes that occur in the eye when focusing on distant objects, demonstrating a clear understanding of the relationship between ciliary muscles, suspensory ligaments, and lens shape. The question assesses the student's ability to explain a specific biological process.
Common mistake
Ciliary Muscles and Suspensory Ligaments Function
Students often confuse the roles of ciliary muscles and suspensory ligaments during accommodation, thinking they both contract or relax in the same way.
Remember that when focusing on near objects, ciliary muscles contract, causing the lens to become thicker, while suspensory ligaments loosen. For distant objects, ciliary muscles relax and suspensory ligaments tighten, making the lens thinner.
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